Dental casting machine



Jam. 2, 1923. f

E. KIMMG ET AL. DENTAL CAsrINc MACHINE.

FILED FEB. l5. 192|.

f TToRNEY.

Patented Jan. 2, 1923.

N UEMs STATESv EML KIMMIG, 01E JERSEY CITY HEIGHTS, NEWJERSEY, ANDSAMUEL SILVER, OF

Y BROOKLYN, NEW YORK.

DENTAL CASTING MACHINE;

Application inea February 15, 1921. serial no. 445,087'.

To alla!) 7mm t 'may concer/m:

'Beit known'that we, EMIL KIMMIGand SAMUEL SILVER, res ectively citizensofthe United States and -freat Britaim and residents of Jersey CityHeights and Brooklyn, in the counties of Hudson and `Kings and States ofNew Jersey and Neworka have invented certain new and IusefulImprovements in entalCasting Machines, of which the following is aspecification.

`This invention i lrela'tes essentially to a," portable machinel forcastingy dental metal members such as teeth fillings, crowns, plates andsimilar'V small articles of different designs depending on the mold usedfor the purpose.

An object of the invention is to provide a `pump controlled bytheoperator for compressing the atmospheric air in the pump cylinder sothatit will flow into a ask after it is `sealed by they cylinder andadapted to contain the molden casting, f

Another object of' the invention is to provide means for swinging thepump cylinder out of the way-when it desired to bring a blow pipe intoaction to melt the meta-l.

Another object ol the invention is to provide the blow pipe with meansfor horizontallyoscillating it in order to turn on or shut ofi thecombustible and at the same time place the pipe in or out of action.

Another object of the invention is to provide means for verticallyadjusting the pump cylinder to or from the top or the flask to set it inalignment with different dimensional flasks. j

rEhe novel combinations of the invention are more fully described in thefollowing specification and claims and illustrated in theaccompanyingdrawing in which:

Fig. 1 represents a sectional side elevation of a machine embodying thisinvention.

Fig. 2 isa rear view of the lower part of the machine.

Fig. 8 is a vertical section taken` at right angles to Fig. 1 showingthe pump cylinder swung over and the blov,T pipe in action.

Fig. 4t is a plan view of Fig. 3, some of the parts being broken away.

Fig. 5 is a vertical section on a larger scale of the-valve connection.

ln the drawing the numeral 6 designates a base having an annular recess7 made to lit a flask S suitable tor holdingl a mold carrying the metalto be cast. s shown the flask is cylindrical and it has an open top togive access tothe interior of the flask when uncovered.

' The means forat times sealing or covering the top consists in generalof a pump for compressing air, andl it includes a cylin` der 9 having apiston 10 slidingly mounted therein.- A stem 11 extends up through ahole in a screw cover 12 closing the top of the cylinder, and the stemhas a handle 14 .surmounting the top whereby the piston is manipulated.The bottom of the cylinder is equipped with a diaphragm 15 provided witha seriesof lsmall holes 16 to permit the flow of the compressed airinthe cylinder into the flask. An annular member 17 forming an integralpart of or brazed to the cylinder hasa countersunk bottom 18 to seat apacking 19 of heat resisting substance such as asbestos, for engagementwith the top of the flask. lhen the cylinder covers the top of the flaskas indicated in Fig. 17 the packing prevents anyle'akage of air from theflask. j

Projecting rearwardly from the annular member is a lug QO-pivoted Vat 21to a bifurcated slotted member 22 extending downwardly. grooved standard23 best seen in Fig. Q forminga contiguous extension at the rear of thebase Acoacts with the flat stem of' the slotted member to guide it up ordown and a thumb bolt 24 holds the parts in locked position. lVhen thethumb bolt is loosened the slotted member 22 can be slid in the grooveto move the cylinder up or down within the limits of' the slot so as tobring it in line with the top of' the flask thus accommodating flasks ofdifferent heights and dimensions. A handle 13 fixed to the front of thecylinder opposite the lug serves as a grip to actuate the cylinder.

A blow pipe for melting the metal in the mold comprehends a post 25secured to an extension located at the right hand side of the base asindicated in Fig. 3. The post has a. bifurcated top 26 with tapped holesfor the insertion of a pivot or bolt 2T made to pass through an eyeformed in the stem 28 of a valve 29 so as to iix it to the post. Acasing` 80 having a nozzle 31 is supported on the valve. Inlet pipes 32and 38 carried by the casing respectively supply air and a fuel such asilluminating gas to flameat the noz- Zle and be projected into the flaskto heat the metal placed in a mold as is well known.

As shown the nozzle is pointed towards the ask while 'in action, butwhen it is desired to shut off the fuel the nozzle is given aone-quarter turn about the valve as indicated inldotted lines in Fig. 4.`When the nozzle is in action the cylinder is swung over with its axisat right angles to the flask.`

The machine is portable consequently it can be conveniently carried andby having the pump arranged on the base in close relation with theflask, the use of la separate compressed rair tank is eliminated. Theoperation of the machine is as follows: The mold with the metal isplaced .in the flask after the scylindueris swung over to open the flaskfas indicated in Fig. 8, the flame from thepblow pipe then melts themetal-and the pipe is turned out ot the way. The cylinder is thenswungfback to engage the upper portion of the lflask, the `piston in themean timeyhas been pulled upward expelling the air above it-andadmitting `air through the apertures in thev'bottom to lill the spacebelow the piston. The piston is -then pushed downward compressing` -the-air below the piston -'which Iiows A `through the aperturesintoftheflask. V.The molden metal will be forced into `:all` thecavities prepared for it in the mold bythe .air pressure `thuspreventi-ng any flaws `forming in Ithe metal after it cools. y p

.It will be readily understood that the `machine can be used to ycastanysmall. metal article, and the air in the flask is driven 1out bytheforce ot' lthe compresedairtabove it through channels 34: in the base so'that the actuation ofthe pump creates a continuous circulationto insurerapid cooling andl a casting free from pores. a lvlodilications of theinvention can be made within lthe law of equivalents and scope ofi-theclaims for eX- ample, the extension carrying the post 25 could beremovable and fixed to. the opposite side ot thebase in order toaccommodate a left handed operato-r.

l. A casting machine comprising a base having a standard, an open flaskremovably mountedon' the base, a pump cylinder oprovided with a lug, thelower end of the cylinder being normally in engagement with the upperopen portion of the laSlr, a vdevicefor swingingly andmovably connectingthe lug tojthe standard-to VAraise or lower 'the cyli-nder, and meansfor lockingthe movable device ,to .the standard.

V2, A; casting machine comprising' a 'base havingl a standard, Van Vopen'flask` removably mounted onthe base, a'pumfp eylindergprevided with alug, the lower par-t of fthe cylinder being normally adapted to engagethe upper open portion of the ask,.a depending memberhinjged to the lug,means for slidingly connecting .the member to-thestand ard to raise orlower. the cylinder, .and means tor locking` the member tothe standard.

8. A casting machine comprising base having a grooved standard, an openrflask removably mounted on the base, a pum-p cylinder provided w-ith arearwardly projectingrlug, thelower endof the cylinder being normallyadapted to engage the upper open portion of the ,laskfa slotteddepe'nding member "hinged to :the lug 'and' vertically slidable inthe grooveto'raise or vlower the cylinder, and a bolt coacting withthe slot forlocking the member Ato the standard.

Signed at N ew York in the county of N ew York land :State (iiNew YorkAthisV 5th .d ay ot' lE/brnary A. l). Ai921.

EMIL KIMMlG-,-

SAMUEL .S-ILVLER.

